net: ngbe: fix NULL pointer dereference in non-MSI-X interrupt enabling (CVE-2026-74741) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-74741

net: ngbe: fix NULL pointer dereference in non-MSI-X interrupt enabling

Answer in brief

CVE-2026-74741 records a Unknown severity vulnerability in net: ngbe: fix NULL pointer dereference in non-MSI-X interrupt enabling. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 26, 2026Updated Aug 26, 2026Source checked Aug 26, 2026First seen by HOL Aug 26, 2026Material review Aug 26, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=4174c0c331a2aa3322d3b3be532808deb041b37d <cef4c5b9aca24651d069adf9462b221df6a2a669 \|\| >=4174c0c331a2aa3322d3b3be532808deb041b37d <0ab482b2195edc000262f0eae1cdcb416b8f335d \|\| >=4174c0c331a2aa3322d3b3be532808deb041b37d <5f3a13e0bb5ebcc1ca2dfda42ea40b9f3c2be6ea	cef4c5b9aca24651d069adf9462b221df6a2a669, 0ab482b2195edc000262f0eae1cdcb416b8f335d, 5f3a13e0bb5ebcc1ca2dfda42ea40b9f3c2be6ea
Linux/Linuxgeneric	6.16	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to cef4c5b9aca24651d069adf9462b221df6a2a669 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 26, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 26, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 26, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: net: ngbe: fix NULL pointer dereference in non-MSI-X interrupt enabling In non-MSI-X mode (such as legacy INTx or single MSI), wx->msix_entry is not allocated or initialized. Calling NGBE_INTR_MISC(wx) dereferences wx->msix_entry->entry, leading to a NULL pointer dereference crash. This issue was introduced by fixing the IRQ vector when the number of VFs is 7. Fix the issue by explicitly checking `pdev->msix_enabled` to determine the correct vector index. Additionally, as a side fix, set the interrupt mask to BIT(0) for the non-MSI-X fallback. In MSI/INTx mode, the MISC and queue interrupts share vector 0, and the WX_PX_MISC_IVAR register is only valid in the MSI-X case. Thus, BIT(0) is the correct mask for the miscellaneous cause when MSI-X is disabled.

Quoted source text, attributed separately from HOL analysis.